<template>
  <div>
    <div class="shopcart">
      <div class="content">
        <div class="content-left">
          <div class="logo-wrapper" @click="toggleShow()">
            <div class="logo" :class="{highlight:totalCount}">
              <i class="iconfont icon-shopping_cart" :class="{highlight:totalCount}"></i>
            </div>
            <div class="num" v-if="totalCount">{{totalCount}}</div>
          </div>
          <div class="price" :class="{highlight:totalCount}">￥{{totalPrice}}</div>
          <div class="desc">另需配送费￥{{info.deliveryPrice}} 元</div>
        </div>
        <div class="content-right">
          <!-- 定义2个计算属性 -->
          <div class="pay" :class="priceclass">{{minprice}}</div>
        </div>
      </div>
      <transition name="move">
        <div class="shopcart-list" v-show="showcount">
          <div class="list-header">
            <h1 class="title">购物车</h1>
            <span class="empty" @click="clearcar()">清空</span>
          </div>
          <div class="list-content">
            <ul>
              <li class="food" v-for="(item,i) in cartFoods" :key="i">
                <span class="name">{{item.name}}</span>
                <div class="price">
                  <span>￥{{item.price}}</span>
                </div>
                <div class="cartcontrol-wrapper">
                  <shopadd :food="item"/>
                </div>
              </li>
            </ul>
          </div>
        </div>
      </transition>
    </div>
    <div class="list-mask" v-show="showcount" @click="toggleShow()"></div>
  </div>
</template>
<script>
import shopadd from "./shopadd/shopadd.vue"; //引入插件
import { mapState, mapGetters } from "vuex";
import BScroll from "better-scroll"; //引入滚动插件
import { MessageBox, Toast } from "mint-ui"; //ui插件
export default {
  data() {
    return {
      show: false
    };
  },
  mounted() {
    // console.log(this.cartFoods);
  },
  computed: {
    ...mapState(["cartFoods", "info"]),
    ...mapGetters(["totalCount", "totalPrice"]),
    //计算样式
    priceclass() {
      let totalPrice = this.totalPrice;
      let minPrice = this.info.minPrice;
      // console.log(minPrice);
      return totalPrice >= minPrice ? "enough" : "not-enough";
    },
    //价格
    minprice() {
      let totalPrice = this.totalPrice;
      let minPrice = this.info.minPrice;
      if (totalPrice == 0) {
        return `还差￥${minPrice}元起送`;
      } else if (totalPrice < minPrice) {
        return `还差￥${minPrice - totalPrice}元起送`;
      } else {
        return `结算￥${totalPrice}`;
      }
    },
    //数量为0的时候 不显示购物车
    showcount() {
      let totalCount = this.totalCount;
      if (totalCount == 0) {
        this.show = false;
        return false;
      }
      if (this.show) {
        //购物车列表滚动
        this.$nextTick(() => {
          new BScroll(".list-content", {
            click: true
          });
        });
      }
      return this.show;
    }
  },
  methods: {
    toggleShow() {
      // 只有当总数量大于0时切换
      if (this.totalCount > 0) {
        this.show = !this.show;
      }
    },
    //清空购物车
    clearcar() {
      MessageBox.confirm("确定清空购物车吗?").then(
        action => {
          this.$store.dispatch("clearCart");
        },
        action => {}
      );
    }
  },
  components: {
    shopadd
  }
};
</script>
<style lang="stylus" rel="stylesheet/stylus" scoped>
@import '../../common/stylus/mixins.styl';

.shopcart {
  position: fixed;
  left: 0;
  bottom: 0;
  z-index: 50;
  width: 100%;
  height: 48px;

  .content {
    display: flex;
    background: #141d27;
    font-size: 0;
    color: rgba(255, 255, 255, 0.4);

    .content-left {
      flex: 1;

      .logo-wrapper {
        display: inline-block;
        vertical-align: top;
        position: relative;
        top: -10px;
        margin: 0 12px;
        padding: 6px;
        width: 56px;
        height: 56px;
        box-sizing: border-box;
        border-radius: 50%;
        background: #141d27;

        .logo {
          width: 100%;
          height: 100%;
          border-radius: 50%;
          text-align: center;
          background: #2b343c;

          &.highlight {
            background: $green;
          }

          .icon-shopping_cart {
            line-height: 44px;
            font-size: 24px;
            color: #80858a;

            &.highlight {
              color: #fff;
            }
          }
        }

        .num {
          position: absolute;
          top: 0;
          right: 0;
          width: 24px;
          height: 16px;
          line-height: 16px;
          text-align: center;
          border-radius: 16px;
          font-size: 9px;
          font-weight: 700;
          color: #ffffff;
          background: rgb(240, 20, 20);
          box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.4);
        }
      }

      .price {
        display: inline-block;
        vertical-align: top;
        margin-top: 5px;
        line-height: 24px;
        padding-right: 12px;
        box-sizing: border-box;
        font-size: 16px;
        font-weight: 700;
        color: #fff;

        &.highlight {
          color: #fff;
        }
      }

      .desc {
        display: inline-block;
        vertical-align: bottom;
        margin-bottom: 15px;
        margin-left: -45px;
        font-size: 10px;
      }
    }

    .content-right {
      flex: 0 0 105px;
      width: 105px;

      .pay {
        height: 48px;
        line-height: 48px;
        text-align: center;
        font-size: 12px;
        font-weight: 700;
        color: #fff;

        &.not-enough {
          background: #2b333b;
        }

        &.enough {
          background: #00b43c;
          color: #fff;
        }
      }
    }
  }

  .ball-container {
    .ball {
      position: fixed;
      left: 32px;
      bottom: 22px;
      z-index: 200;
      transition: all 0.4s cubic-bezier(0.49, -0.29, 0.75, 0.41);

      .inner {
        width: 16px;
        height: 16px;
        border-radius: 50%;
        background: $green;
        transition: all 0.4s linear;
      }
    }
  }

  .shopcart-list {
    position: absolute;
    left: 0;
    top: 0;
    z-index: -1;
    width: 100%;
    transform: translateY(-100%);

    &.move-enter-active, &.move-leave-active {
      transition: transform 0.3s;
    }

    &.move-enter, &.move-leave-to {
      transform: translateY(0);
    }

    .list-header {
      height: 40px;
      line-height: 40px;
      padding: 0 18px;
      background: #f3f5f7;
      border-bottom: 1px solid rgba(7, 17, 27, 0.1);

      .title {
        float: left;
        font-size: 14px;
        color: rgb(7, 17, 27);
        font-weight: 600;
      }

      .empty {
        float: right;
        font-size: 12px;
        color: #ffffff;
        height: 30px;
        background: red;
        width: 40px;
        margin-top: 5px;
        line-height: 30px;
        text-align: center;
      }
    }

    .list-content {
      padding: 0 18px;
      max-height: 217px;
      overflow: hidden;
      background: #fff;

      .food {
        position: relative;
        padding: 12px 0;
        box-sizing: border-box;
        bottom-border-1px(rgba(7, 17, 27, 0.1));

        .name {
          line-height: 24px;
          font-size: 14px;
          color: rgb(7, 17, 27);
        }

        .price {
          position: absolute;
          right: 90px;
          bottom: 12px;
          line-height: 24px;
          font-size: 14px;
          font-weight: 700;
          color: rgb(240, 20, 20);
        }

        .cartcontrol-wrapper {
          position: absolute;
          right: 0;
          bottom: 6px;
        }
      }
    }
  }
}

.list-mask {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 40;
  backdrop-filter: blur(10px);
  opacity: 1;
  background: rgba(7, 17, 27, 0.6);

  &.fade-enter-active, &.fade-leave-active {
    transition: all 0.5s;
  }

  &.fade-enter, &.fade-leave-to {
    opacity: 0;
    background: rgba(7, 17, 27, 0);
  }
}
</style>